Likely it's just the light shock, transplant shock, and the change of medium and nutrients.
I would:
Raise the lights to about 2 feet from tops, till they are acclimated. A week or so should do, then start incrementally lowering the lights to a 'normal' height.

Avoid foliar feeding/spraying with the lights on. Each droplet of water acts like a magnifying glass. (raise lights till droplets dry, if need be)

Avoid full-on fan blast. This will dry 'em out quickly, too. A gentle breeze to start, increasing as they progress.

I wouldn't give 'em additional nutes till they are acclimated, or showing signs of defeciency. (half strength for first week or two)

At least, this is what I'd do for a soil grow. Not sure about the nutes issue with coco. Shouldn't be much difference, but hopefully someone with more coco experience will be able to correct me if I'm wrong. :thumbsup: